feat: cron jobs — daily summary, speaker clustering, clip purge

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/cron/daily_summary.py

@@ -0,0 +1,48 @@
+import sqlite3
+import httpx
+from app.shared.config import Settings
+
+
+def generate_daily_summary(date: str, settings: Settings, db: sqlite3.Connection) -> None:
+    rows = db.execute("""
+        SELECT u.start_time, u.transcript, r.name as room_name, s.name as speaker_name
+        FROM utterances u
+        JOIN rooms r ON u.room_id = r.id
+        LEFT JOIN speakers s ON u.speaker_id = s.id
+        WHERE date(u.start_time) = ?
+        ORDER BY u.start_time ASC
+    """, (date,)).fetchall()
+
+    if not rows:
+        return
+
+    lines = [
+        f"[{r['room_name']} {r['start_time']}] {r['speaker_name'] or 'Unknown'}: {r['transcript']}"
+        for r in rows
+    ]
+    context = "\n".join(lines)
+
+    prompt = (
+        f"Summarize the following household conversations from {date} in 2-4 sentences. "
+        f"Focus on key decisions, activities, and topics discussed. Do not transcribe verbatim.\n\n"
+        f"{context}"
+    )
+
+    resp = httpx.post(
+        f"{settings.ollama_url}/api/chat",
+        json={
+            "model": settings.ollama_model,
+            "messages": [{"role": "user", "content": prompt}],
+            "stream": False,
+        },
+        timeout=120.0,
+    )
+    resp.raise_for_status()
+    summary = resp.json()["message"]["content"]
+
+    db.execute(
+        "INSERT INTO daily_summaries (date, summary_text) VALUES (?,?) "
+        "ON CONFLICT(date) DO UPDATE SET summary_text=?, generated_at=CURRENT_TIMESTAMP",
+        (date, summary, summary),
+    )
+    db.commit()